52561518 has 32 divisors (see below), whose sum is σ = 112409856.
Its totient is φ = 16326528.
The previous prime is 52561517. The next prime is 52561519. The reversal of 52561518 is 81516525.
It is an interprime number because it is at equal distance from previous prime (52561517) and next prime (52561519).
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (52561517) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8005 + ... + 13007.
It is an arithmetic number, because the mean of its divisors is an integer number (3512808).
Almost surely, 252561518 is an apocalyptic number.
52561518 is an abundant number, since it is smaller than the sum of its proper divisors (59848338).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
52561518 is a wasteful number, since it uses less digits than its factorization.
52561518 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5128.
The product of its digits is 12000, while the sum is 33.
The square root of 52561518 is about 7249.9322755458.
The cubic root of 52561518 is about 374.5898163842.
The spelling of 52561518 in words is "fifty-two million, five hundred sixty-one thousand, five hundred eighteen".